Currently there is no socket for daemon instances launched during the
selinux phase of init. We don't create any sockets due to the complexity
of the required sepolicy.
This workaround will allow us to create the socket with very minimal
sepolicy changes. init will launch a one-off instance of snapuserd in
"proxy" mode, and then the following steps will occur:
1. The proxy daemon will be given two sockets, the "normal" socket that
snapuserd clients would connect to, and a "proxy" socket.
2. The proxy daemon will listen on the proxy socket.
3. The first-stage daemon will wake up and connect to the proxy daemon
as a client.
4. The proxy will send the normal socket via SCM_RIGHTS, then exit.
5. The first-stage daemon can now listen and accept on the normal
socket.
Ordering of these events is achieved through a snapuserd.proxy_ready
property.
Some special-casing was needed in init to make this work. The snapuserd
socket owned by snapuserd_proxy is placed into a "persist" mode so it
doesn't get deleted when snapuserd_proxy exits. There's also a special
case method to create a Service object around a previously existing pid.
Finally, first-stage init is technically on a different updateable
partition than snapuserd. Thus, we add a way to query snapuserd to see
if it supports socket handoff. If it does, we communicate this
information through an environment variable to second-stage init.
Bug: 193833730
Test: manual test
Change-Id: I1950b31028980f0138bc03578cd455eb60ea4a58
This reverts commit 1c51525f66 because it
accidentally made reboot_on_failure be a no-op for all services. This
is because Reap() itself calls KillProcessGroup() on devices with a
vendor level >= R, which in turn sets SVC_STOPPING. I had overlooked
this somehow, probably because I didn't consider that a service can
consist of multiple processes.
It turns out that real FDE devices don't actually need the above commit
because FDE devices aren't allowed to have updatable apexes enabled, and
without updatable apexes enabled, apexd exits automatically and
therefore doesn't have to be stopped. This can be verified by using the
aosp_cf_x86_phone_noapex build target, rather than aosp_cf_x86_phone
which I had used for testing before. So just revert it for now.
Bug: 194370048
Change-Id: I90eddf2a87397449b241e5acaaa8d4a4241d73a9
Add a new service flag SVC_STOPPING which tracks whether a service is
being manually stopped by init, and make the "reboot_on_failure" service
setting not apply when SVC_STOPPING is set.
This is needed for devices that use FDE, because otherwise the device
reboots during the following init script fragment:
on property:vold.decrypt=trigger_shutdown_framework
class_reset late_start
class_reset main
class_reset_post_data core
class_reset_post_data hal
... because that stops all services, including apexd which has been
marked with reboot_on_failure since
https://android-review.googlesource.com/c/platform/system/apex/+/1325212.
So init was killing apexd, then rebooting the device because apexd
"failed" due to having been killed. Making reboot_on_failure not apply
when init stops a service itself fixes the problem.
This is one of a set of changes that is needed to get FDE working again
so that devices that launched with FDE can be upgraded to Android 12.
Bug: 186165644
Test: Tested FDE on Cuttlefish
Change-Id: I599f7ba107e6c126e8f31d0ae659f0ae672a25e4
Any service which is executed when Runtime apex is mounted, but
linkerconfig is not updated can fail to be executed due to missing
information in ld.config.txt. This change updates init to have a status
variable which contains if current mount namespace is default
and APEX is not ready from ld.config.txt, and use bootstrap namespace if
it is not ready.
Bug: 181348374
Test: cuttlefish boot succeeded
Change-Id: Ia574b1fad2110d4e68586680dacbe6137186546e
Also includes new --out_<partition> flags for
system,system_ext,product,vendor,odm
to allow host_init_verifier to work with a collection of init rc files.
Test: host_init_verifier --out_system=... --out_vendor=...
where vendor contains an init rc file that overrides a service
present in system. Observe parse failure and non-zero exit.
Bug: 163089173
Change-Id: I520fef613e0036df8a7d47a98d47405eaa969110
The critical services can now using the interface `critical
[window=<fatal crash window mins>] [target=<fatal reboot target>]` to
setup the timing window that when there are more than 4 crashes in it,
the init will regard it as a fatal system error and reboot the system.
Config `window=${zygote.critical_window.minute:-off}' and
`target=zygote-fatal' for all system-server services, so platform that
configures ro.boot.zygote_critical_window can escape the system-server
crash-loop via init fatal handler.
Bug: 146818493
Change-Id: Ib2dc253616be6935ab9ab52184a1b6394665e813
Introduce new command to allow setting task profiles from inside .rc
script. This is to replace usage of writepid when a service is trying
to join a cgroup. Usage example from a .rc file:
service surfaceflinger /system/bin/surfaceflinger
task_profiles HighPerformance
Bug: 155419956
Test: change .rc file and confirm task profile is applied
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I0add9c3b363a7cb1ea89778780896cae1c8a303c
Some services are lazy HALs on some platforms and not lazy HALs on
others; this is known at runtime by hwservicemanager, so this change
adds these properties to allow hwservicemanager to turn one oneshot
(for lazy HALs). It may also be required to make a lazy HAL not lazy
anymore, and oneshot_off is provided for this.
Bug: 147841742
Test: new unit test that turn on and off oneshot on a service (bootanim)
and observes that it follows the expected behavior
Change-Id: I79524e2c9a5008f90c8d3bc40920fde00602a439
This is apparently causing problems with reboot.
This reverts commit 7205c62933.
Bug: 150863651
Test: build
Change-Id: Ib8a4835cdc8358a54c7acdebc5c95038963a0419
A previous change moved property_service into its own thread, since
there was otherwise a deadlock whenever a process called by init would
try to set a property. This new thread, however, would send a message
via a blocking socket to init for each property that it received,
since init may need to take action depending on which property it is.
Unfortunately, this means that the deadlock is still possible, the
only difference is the socket's buffer must be filled before init deadlocks.
There are possible partial solutions here: the socket's buffer may be
increased or property_service may only send messages for the
properties that init will take action on, however all of these
solutions still lead to eventual deadlock. The only complete solution
is to handle these messages asynchronously.
This change, therefore, adds the following:
1) A lock for instructing init to reboot
2) A lock for waiting on properties
3) A lock for queueing new properties
4) A lock for any actions with ServiceList or any Services, enforced
through thread annotations, particularly since this code was not
designed with the intention of being multi-threaded.
Bug: 146877356
Bug: 148236233
Test: boot
Test: kill hwservicemanager without deadlock
Change-Id: I84108e54217866205a48c45e8b59355012c32ea8
Such services will be re-parsed and added back to the service list
during post-fs-data stage.
Test: adb reboot userspace
Test: atest CtsInitTestCases
Bug: 145669993
Bug: 135984674
Change-Id: Ibb393dfe0f101c4ebe37bc763733fd5d981d3691
~2007 a change was added that would allow oneshot services to
daemonize by not killing their process group. This was a hack at the
time, and should certainly not be needed now. I've resisted removing
the behavior however, as it hadn't caused any issues.
Recently, it was detected that the cgroups that these processes belong
to, would exist forever and therefore leak memory. Instead of simply
removing the cgroups when empty, this provides a good opportunity to
do the right thing and fix this behavior once and for all.
The new (correct) behavior only happens for devices with vendor images
built for Android R or later. Init will log a warning to dmesg when
it detects this difference in behavior has occurred.
Bug: 144545923
Test: boot CF/Coral and see no difference in behavior.
Test: boot CF with a service that daemonizes and see the warning.
Change-Id: I333a2e25a541ec0114ac50ab8ae7f1ea3f055447
* Refactored code around stopping services a little bit to reuse it
between full reboot and userspace reboot.
* Add a scope_guard to fallback to full reboot in case userspace reboot
fails.
* In case of userspace reboot init will also wait for services to be
terminated/killed and log the ones that didn't react to
SIGTERM/SIGKILL in time.
* If some of the services didn't react to SIGKILL, fail userspace reboot.
Test: adb reboot userspace
Bug: 135984674
Change-Id: I820c7bc406169333b0f929f0eea028d8384eb2ac
This replaces the recently added `exec_reboot_on_failure` builtin, since
it'll be cleaner to extend service definitions than extending `exec`.
This is in line with what we decided when adding `exec_start` instead
of extending `exec` to add parameters for priority.
Test: `exec_start` a service with a reboot_on_failure option and watch
the system reboot appropriately when the service is not found and when
the service terminates with a non-zero exit code.
Change-Id: I332bf9839fa94840d159a810c4a6ba2522189d0b
Host init verifier already checks that the names and number of
arguments for builtins are correct, but it can check more. This
change ensures that property expansions are well formed, and that
arguments that can be parsed on the host are correct. For example it
checks that UIDs and GIDs exist, that numerical values can be parsed,
and that rlimit strings are correct.
Test: build
Change-Id: Ied8882498a88a9f8324db6b8d1020aeeccc8177b
clang-tidy hinted that some of this code wasn't right. Looking
deeper, there is really not much related to file and socket
descriptors, except that they're published in similar ways to the
environment. All of the abstraction into a 'Descriptor' class takes
us further away from specifying what we really mean.
This removes that abstraction, adds stricter checks and better errors
for parsing init scripts, reports sockets and files that are unable to
be acquired before exec, and updates the README.md for the passcred
option.
Test: build, logd (uses files and sockets) works
Change-Id: I59e611e95c85bdbefa779ef69b32b9dd4ee203e2
android-base:
* Add NOLINT for expanding namespace std for std::string* ostream
overload
libdm:
* Fix missing parentesis around macro parameters
init:
* Fix missing CLOEXEC usage and add NOLINT for the intended
usages.
* Fix missing parentesis around macro parameters
* Fix erase() / remove_if() idiom
* Correctly specific unsigned char when intended
* 'namespace flags' should be signed, since 'flags' it signed for
clone()
* Add clear to property restore vector<string> to empty after move
* Explicit comparison against 0 for strcmp
Test: build
Change-Id: I8c31dafda2c43ebc5aa50124cbbd6e23ed2c4101
Now that Result<T> is actually expected<T, ...>, and the expected
proposal states expected<void, ...> as the way to indicate an expected
object that returns either successfully with no object or an error,
let's move init's Result<Success> to the preferred Result<void>.
Bug: 132145659
Test: boot, init unit tests
Change-Id: Ib2f98396d8e6e274f95a496fcdfd8341f77585ee
Factors out utility functions into service_utils.h/cpp, so that they
can be reused by the upcoming native zygote.
Bug: 133443795
Test: Build and boot cuttlefish.
Change-Id: I0531b6f17561119c8cc33dd9ba375b351747fcfe
This keyword was introduced to support restarting services on devices
using APEX and FDE. The current implementation is not a restart, but
rather a 'reset' followed by a 'start', because the real /data must be
mounted in-between those two actions. But we effectively want this to be
a restart, which means that we also want to start 'disabled' services
that were running at the time we called 'class_reset_post_data'.
To implement this, keep track of whether a service was running when its
class was reset at post-data, and start all those services.
Bug: 132592548
Test: manual testing on FDE Taimen
Change-Id: I1e81e2c8e0ab2782150073d74e50e4cd734af7b9
Merged-In: I1e81e2c8e0ab2782150073d74e50e4cd734af7b9
On devices that use FDE and APEX at the same time, we need to bring up a
minimal framework to be able to mount the /data partition. During this
period, a tmpfs /data filesystem is created, which doesn't contain any
of the updated APEXEs. As a consequence, all those processes will be
using the APEXes from the /system partition.
This is obviously not desired, as APEXes in /system may be old and/or
contain security issues. Additionally, it would create a difference
between FBE and FDE devices at runtime.
Ideally, we restart all processes that have started after we created the
tmpfs /data. We can't (re)start based on class names alone, because some
classes (eg 'hal') contain services that are required to start apexd
itself and that shouldn't be killed (eg the graphics HAL).
To address this, keep track of which processes are started after /data
is mounted, with a new 'mark_post_data' keyword. Additionally, create
'class_reset_post_data', which resets all services in the class that
were created after the initial /data mount, and 'class_start_post_data',
which starts all services in the class that were started after /data was
mounted.
On a device with FBE, these keywords wouldn't be used; on a device with
FDE, we'd use them to bring down the right processes after the user has
entered the correct secret, and restart them.
Bug: 118485723
Test: manually verified process list
Change-Id: I16adb776dacf1dd1feeaff9e60639b99899905eb
In particular, this allows services running as the root user to have
capabilities removed instead of always having full capabilities.
Test: boot device with a root service with an empty capabilities
option in init showing no capabilities in /proc/<pid>/status
Change-Id: I569a5573ed4bc5fab0eb37ce9224ab708e980451
This CL fixes the design problem of the previous mechanism for providing
the bootstrap bionic and the runtime bionic to the same path.
Previously, bootstrap bionic was self-bind-mounted; i.e.
/system/bin/libc.so is bind-mounted to itself. And the runtime bionic
was bind-mounted on top of the bootstrap bionic. This has not only caused
problems like `adb sync` not working(b/122737045), but also is quite
difficult to understand due to the double-and-self mounting.
This is the new design:
Most importantly, these four are all distinct:
1) bootstrap bionic (/system/lib/bootstrap/libc.so)
2) runtime bionic (/apex/com.android.runtime/lib/bionic/libc.so)
3) mount point for 1) and 2) (/bionic/lib/libc.so)
4) symlink for 3) (/system/lib/libc.so -> /bionic/lib/libc.so)
Inside the mount namespace of the pre-apexd processes, 1) is
bind-mounted to 3). Likewise, inside the mount namespace of the
post-apexd processes, 2) is bind-mounted to 3). In other words, there is
no self-mount, and no double-mount.
Another change is that mount points are under /bionic and the legacy
paths become symlinks to the mount points. This is to make sure that
there is no bind mounts under /system, which is breaking some apps.
Finally, code for creating mount namespaces, mounting bionic, etc are
refactored to mount_namespace.cpp
Bug: 120266448
Bug: 123275379
Test: m, device boots, adb sync/push/pull works,
especially with following paths:
/bionic/lib64/libc.so
/bionic/bin/linker64
/system/lib64/bootstrap/libc.so
/system/bin/bootstrap/linker64
Change-Id: Icdfbdcc1efca540ac854d4df79e07ee61fca559f
This reverts commit 2599088ff6.
Reason: Breaks some 3p apps.
Bug: 122920047
Test: run the app, login.
Change-Id: Idea332b1f91e9d2ac6ebd3879da7820c8ba2284f
This change makes the bionic libs and the dynamic linker from the
runtime APEX (com.android.runtime) available to all processes started
after apexd finishes activating APEXes.
Specifically, the device has two sets of bionic libs and the dynamic
linker: one in the system partition for pre-apexd processes and another
in the runtime APEX for post-apexd processes. The former is referred as
the 'bootstrap' bionic and are located at
/system/lib/{libc|libdl|libm}.so and /system/bin/linker. The latter is
referred as the 'runtime' bionic and are located at
/apex/com.android.runtime/lib/bionic/{libc|libdl|libm}.so and
/apex/com.android.runtime/bin/linker.
Although the two sets are located in different directories, at runtime,
they are accessed via the same path: /system/lib/* and
/system/bin/linker ... for both pre/post-apexd processes. This is done
by bind-mounting the bootstrap or the runtime bionic to the same path.
Keeping the same path is necessary because there are many modules and
apps that explicitly or implicitly depend on the fact that bionic libs
are located in /system/lib and are loaded into the default linker
namespace (which has /system/lib in its search paths).
Before the apexd is started, init executes a built-in action
'prepare_bootstrap_bionic' that bind-mounts the bootstrap bionic to the
mount points. Processes started during this time are provided with the
bootstrap bionic. Then after the apexd is finished, init executes
another built-in action 'setup_runtime_bionic' which again mounts the
runtime bionic to the same mount points, thus hiding the previous mounts
that target the bootstrap bionic. The mounting of the runtime bionic
(which is only for post-apexd processes) is hidden from pre-apexd
processes by changing propagation type of the mount points to 'private'
and execute the pre-apexd processes with a new mount namespace using
unshare(2). If a pre-apexd process crashes and re-launched after the
apexd is on, the process still gets the bootstrap bionic by unmounting
the runtime bionic which effectively un-hides the previous bind-mounts
targeting the bootstrap bionic.
Bug: 120266448
Test: device boots
Test: cat /proc/`pidof zygote`/mountinfo shows that
/system/lib/{libc|libdl|libm}.so and /system/bin/linker are from the
runtime APEX
Test: cat /proc/'pidof vold`/mountinfo shows that the same mount points
are from system partition.
Change-Id: I7ca67755dc0656c0f0c834ba94bf23ba9b1aca68
A service with 'updatable' option can be overriden by the same service
definition in APEXes.
/system/etc/init/foo.rc:
service foo /system/bin/foo
updatable
/apex/myapex/etc/init.rc:
service foo /apex/myapex/bin/foo
override
Overriding a non-updatable (i.e. without updatable option) service
from APEXes is prohibited.
When an updatable service is started before APEXes are all activated,
the execution is delayed until when the APEXes are all activated.
Bug: 117403679
Test: m apex.test; adb push <built_apex> /data/apex; adb reboot
adb shell, then lsof -p $(pidof surfaceflinger) shows that
the process is executing
/apex/com.android.example.apex@1/bin/surfaceflinger instead of
/system/bin/surfaceflinger
Change-Id: I8a57b8e7f6da81b4d2843e261a9a935dd279067c
The memcg.limit_percent option can be used to limit the cgroup's
max RSS to the given value as a percentage of the device's physical
memory. The memcg.limit_property option specifies the name of a
property that can be used to control the cgroup's max RSS. These
new options correspond to the arguments to the limitProcessMemory
function in frameworks/av/media/libmedia/MediaUtils.cpp; this will
allow us to add these options to the rc files for the programs that
call this function and then remove the callers in a later change.
There is also a change in semantics: the memcg.* options now have
an effect on all devices which support memory cgroups, not just
those with ro.config.low_ram or ro.config.per_app_memcg set to true.
This change also brings the semantics in line with the documentation,
so it looks like the previous semantics were unintentional.
Change-Id: I9495826de6e477b952e23866743b5fa600adcacb
Bug: 118642754
ParseLineSection() provides 'args' as an rvalue reference, so its
callers can and should use it as such. This saves some copying
overhead and cleans up the code a bit.
Test: boot
Change-Id: Ib906318583dc81de9ea585f5f09fdff35403be1b
'Critical' services have rebooted into bootloader, like all other
catastrophic init crashes, for years now. Update the text to match.
Test: n/a
Change-Id: Icfc41bf3e383958f14ecfaab9ca187e2c3dc7fd9
Allow services to specify a custom restart period via the
restart_period service option. This will allow services to be run
periodically, such as a service that needs to run every hour.
Allow services to specify a timeout period via the timeout_period
service option. This will allow services to be killed after the
timeout expires if they are still running. This can be combined with
restart_period for creating period services.
Test: test app restarts every minute
Change-Id: Iad017820f9a602f9826104fb8cafc91bfb4b28d6
Drop all references to keychord_id and id and instead use keycodes_
as the id. The keycodes are a std::vector<int> with an unique
sorted-order emplacement method added in the parser. Solves the
academic issue with duplicate keychords and trigger all services
that match rather than first match only.
Test: init_tests
Bug: 64114943
Change-Id: I5582779d81458fda393004c551c0d3c03d9471e0
Add the ability to enter a network namespace when launching a service.
Typical usage of this would be something similar to the below:
on fs
exec ip netns add namespace_name
service vendor_something /vendor/...
capabilities <lower than root>
user not_root
enter_namespace net /mnt/.../namespace_name
Note changes to the `ip` tool are needed to create the namespace in
the correct directory.
Bug: 73334854
Test: not yet
Change-Id: Ifa91c873d36d69db399bb9c04ff2362518a0b07d
FindService can't be used w/ interfaces due
to the fact that multiple interfaces can be
added to any given interface.
Bug: 79418581
Test: boot device, manually use ctl commands
Change-Id: I7c152630462c9b7509473bc190f5b30460fcc2bc
An earlier such change was reverted in commit e242a97db5.
Bug: 70487538
Test: ensure that angler can boot
Merged-In: Id5f57fce1c9b817a2650e0c848143d8a0d286bf0
Change-Id: Id5f57fce1c9b817a2650e0c848143d8a0d286bf0
For instance, on vendor.img:
service foo /vendor/bin/nfc
...
And then on odm.img:
service foo /odm/bin/super-nfc
override
Allows a service on ODM to override a HAL on vendor.
Bug: 69050941
Test: boot, init_tests
Change-Id: I4e908fb66e89fc6e021799fe1fa6603d3072d62a
Allow it to fail. When there is an error for a section ending,
print the error pointing to the line where the section starts.
Bug: 69050941
Test: boot, init_tests
Change-Id: I1d8ed25f4b74cc9ac24d38b8075751c7d606aea8
This associates every service with a list of HIDL services
it provides. If these are disabled, hwservicemanager will
request for the service to startup.
Bug: 64678982
Test: manual with the light service
Change-Id: Ibf8a6f1cd38312c91c798b74574fa792f23c2df4
One of the major aspects of treble is the compartmentalization of system
and vendor components, however init leaves a huge gap here, as vendor
init scripts run in the same context as system init scripts and thus can
access and modify the same properties, files, etc as the system can.
This change is meant to close that gap. It forks a separate 'subcontext'
init that runs in a different SELinux context with permissions that match
what vendors should have access to. Commands get sent over a socket to
this 'subcontext' init that then runs them in this SELinux context and
returns the result.
Note that not all commands run in the subcontext; some commands such as
those dealing with services only make sense in the context of the main
init process.
Bug: 62875318
Test: init unit tests, boot bullhead, boot sailfish
Change-Id: Idf4a4ebf98842d27b8627f901f961ab9eb412aee
Add a new service option, `rlimit` that allows a given rlimit to be
set for a specific service instead of globally.
Use the same parsing, now allowing text such as 'cpu' or 'rtprio'
instead of relying on the enum value for the `setrlimit` builtin
command as well.
Bug: 63882119
Bug: 64894637
Test: boot bullhead, run a test app that attempts to set its rtprio to
95, see that the priority set fails normally but passes when
`rlimit rtprio 99 99` is used as its service option.
See that this fails when `rlimit rtprio 50 50` is used as well.
Test: new unit tests
Change-Id: I4a13ca20e8529937d8b4bc11718ffaaf77523a52
Log Service failures via Result<T> such that their context can be
captured when interacting with services through builtin functions.
Test: boot bullhead
Change-Id: I4d99744d64008d4a06a404e3c9817182c6e177bc
Init keep its own copy of the environment that it uses for execve when
starting services. This is unnecessary however as libc already has
functions that mutate the environment and the environment that init
uses is clean for starting services. This change removes init's copy
of the environment and uses the libc functions instead.
This also makes small clean-up to the way the Service class stores
service specific environment variables.
Test: boot bullhead
Change-Id: I7c98a0b7aac9fa8f195ae33bd6a7515bb56faf78
ServiceManager is essentially just a list now that the rest of its
functionality has been moved elsewhere, so the class is renamed
appropriately.
The ServiceList::Find* functions have been cleaned up into a single
smaller interface.
The ServiceList::ForEach functions have been removed in favor of
ServiceList itself being directly iterable.
Test: boot bullhead
Change-Id: Ibd57c103338f03b83d81e8b48ea0e46cd48fd8f0
